IPS Chemical Interactions Chapter 2 Section 2

Question 1

chemical equation

Answer 1

short, easy way to show a
chemical reaction, using symbols instead of
words

Question 2

chemical formula

Answer 2

a combination of symbols that represents the elements in a compound

Question 3

closed system

Answer 3

matter is not allowed to enter or leave

Question 4

coefficient

Answer 4

a number placed in front of a chemical formula in an equation; tells you how many atoms or molecules of a
reactant or a product will take part in the reaction

Question 5

conservation of mass

Answer 5

during a chemical reaction, matter is not created or destroyed; all atoms present at the start of the reaction
are present at the end

Question 6

decomposition

Answer 6

breaks down compounds into simpler products

Question 7

open system

Answer 7

matter can enter from or escape to the surroundings

Question 8

product

Answer 8

new substances formed when the reaction is complete

Question 9

reactant

Answer 9

the substances you have at the beginning

Question 10

replacement

Answer 10

when one element replaces another in a a compound, or when two elements in different compounds trade places

Question 11

synthesis

Answer 11

when two ore more elements or compounds combine to make a more complex substance

Question 12

What are the steps to writing a balanced chemical equation?

Answer 12

1. Write the equation
2. Count the atoms
3. Use coefficients to balance atoms
4. Look back and check

Question 13

What does the arrow in a chemical equation read as?

Answer 13

“yields”

Question 14

What side of the arrow are the products written on?

Answer 14

right

Question 15

What side of the arrow are the reactants written on?

Answer 15

left